scholarly journals Spatially-Resolved Temperature and Gas Species Changes in a Lean-Burn Engine Emissions Control Catalyst

2010 ◽  
Vol 49 (21) ◽  
pp. 10311-10322 ◽  
Author(s):  
April Russell ◽  
William S. Epling ◽  
Howard Hess ◽  
Hai-Ying Chen ◽  
Cary Henry ◽  
...  
Keyword(s):  
Emissions Control ◽  
Engine Emissions ◽  
Lean Burn ◽  
Spatially Resolved

Electrochemical-catalytic conversion for simultaneous NOx and hydrocarbons emissions control of lean-burn gasoline engine

2011 ◽  
Vol 110 ◽  
pp. 164-170 ◽  
Author(s):  
Ta-Jen Huang ◽  
Chung-Ying Wu ◽  
Sheng-Hsiang Hsu ◽  
Chi-Chang Wu
Keyword(s):  
Gasoline Engine ◽  
Catalytic Conversion ◽  
Emissions Control ◽  
Lean Burn

A study of the behaviour of Pt supported on CeO2–ZrO2/Al2O3–BaO as NO storage–reduction catalyst for the treatment of lean burn engine emissions

2002 ◽  
Vol 75 (1-4) ◽  
pp. 439-449 ◽  
Author(s):  
L.F Liotta ◽  
A Macaluso ◽  
G.E Arena ◽  
M Livi ◽  
G Centi ◽  
...  
Keyword(s):  
Engine Emissions ◽  
Lean Burn

Temperature Measurements at the Outlet of a Lean Burn Single-Sector Combustor by Laser Optical Methods

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Ulrich Doll ◽  
Guido Stockhausen ◽  
Johannes Heinze ◽  
Ulrich Meier ◽  
Christoph Hassa ◽  
...  
Keyword(s):  
Rayleigh Scattering ◽  
Pressure Ratio ◽  
Operating Conditions ◽  
Optical Methods ◽  
Future Application ◽  
Lean Burn ◽  
Spatially Resolved ◽  
Combined Application ◽  
Planar Laser ◽  
Annular Combustor

High overall pressure ratio (OPR) engine cycles for reduced NOx emissions will generate new aggravated requirements and boundary conditions by implementing low emission combustion technologies into advanced engine architectures. Lean burn combustion systems will have a significant impact on the temperature and velocity traverse at the combustor exit. With the transition to high-pressure engines, it is essential to fully understand and determine the high energetic interface between combustor and turbine to avoid excessive cooling. Spatially resolved temperatures were measured at different operating conditions using planar laser-induced fluorescence of OH (OH-PLIF) and filtered Rayleigh scattering (FRS), the latter being used in a combustor environment for the first time. Apart from a conventional signal detection arrangement, FRS was also applied with an endoscope for signal collection, to assess its feasibility for future application in a full annular combustor with restricted optical access. Both techniques are complementary in several respects, which justified their combined application. OH-PLIF allows instantaneous measurements and therefore enables local temperature statistics, but is limited to relatively high temperatures. On the other hand, FRS can also be applied at low temperatures, which makes it particularly attractive for measurements in cooling layers. However, FRS requires long sampling times and therefore can only provide temporal averages. When applied in combination, the accuracy of both techniques could be improved by each method helping to overcome the other's shortcomings.

scholarly journals Cost-Effective Reciprocating Engine Emissions Control and Monitoring for E&P Field and Gathering Engines

2006 ◽  
Author(s):  
Kirby S. Chapman ◽  
Sarah R. Nuss-Warren
Keyword(s):  
Cost Effective ◽  
Emissions Control ◽  
Engine Emissions ◽  
Reciprocating Engine

scholarly journals Cost-Effective Reciprocating Engine Emissions Control and Monitoring for E&P Field and Gathering Engines

2005 ◽  
Author(s):  
Kirby S. Chapman ◽  
Allen J. Adriani
Keyword(s):  
Cost Effective ◽  
Emissions Control ◽  
Engine Emissions ◽  
Reciprocating Engine

Experience With Gas Engines Optimized for H2-Rich Fuels

2003 ◽  
Author(s):  
G. R. Herdin ◽  
F. Gruber ◽  
D. Plohberger ◽  
M. Wagner
Keyword(s):  
Natural Gas ◽  
Fuel Efficiency ◽  
Electrical Power ◽  
Nox Emissions ◽  
Engine Emissions ◽  
Lean Burn ◽  
Good Efficiency ◽  
Gas Engine ◽  
Natural Gas Engines ◽  
Fuel Technology

The gas engine is a very efficient possibility of a technological approach for the conversion of chemically bound energy into mechanical or electrical power. Degrees of efficiency achieved thus far through the electrification of natural gas amount to up to 45% depending on the engine size and further potentials are already being opened up. Gas engines therefore do not need to fear a comparison with diesel engines in terms of efficiency. The modern gas engines have considerable advantages regarding emissions. The state of the art for the NOx emissions of natural gas engines can presently be given as 0.7 g/kWh (diesel 5 g NOx/kWh) with practically particle-free combustion. As a result of these features the gas engine is especially suitable for the very efficient process of cogeneration of heat and power, through which total degrees of fuel efficiency of about 90% can be attained. As such, the gas engine is even superior to all previously introduced types of fuel cells. The utilization of H2-rich gases as fuel can be seen as a new field of application of gas engines. Jenbacher AG already has many years of experience in the field of “H2-rich fuels” with optimization of combustion control and mixture formation. The H2 content extend from 100% to very low caloric values of gases in the range of 1.67 MJ/Nm3. The gases to be utilized by the gas engines come primarily from thermal pyrolysis processes of biomass or RDF fuels. A very good efficiency behavior with uncommonly low NOx emissions can be determined as the common result of all gas engine sizes. In the case of the high NH3 content of e.g. wood gas, despite the extreme lean-burn operation through the primary formation of NOx from the fuel, no NOx minimum can be attained. For the future, making the step into H2-rich fuel technology particularly regarding emissions means a big step towards the low NOx concepts and thus the further reduction of engine emissions.

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